Pile hammer



0. PETERSON FILE HAMMER Aug. 27, 1935.

Filed March 1, 1954 Haw M Patented Aug. 27, 1935 UNITED STATES PATENTOFFICE 6 Claims.

This invention relates to a pile hammer.

An object of the invention is to provide an implement for driving pilesparticularly sheet piling.

Another object of the invention is to provide novel means for guidingthe drive ram forming a part of the hammer.

A further object of the invention is to provide a pile'hammer havingmeans for cushioning the stroke of the ram to prevent the upper end ofthe piling from becoming distorted during the driving operation.

With the above and other objects in view, the invention has particularrelation to certain novel features of construction, operation andarrangement of parts, an example of which is given in this specificationand illustrated in the accompanying drawing, wherein:

Figure 1 shows a side view of the hammer as applied to sheet metalpiling.

Figure 2 shows an edge view thereof partly broken away.

Figure 3 shows a cross sectional view taken on the line 33 of Figure 1,and

Figure 4 shows an enlarged cross sectional view, taken on the line-44 ofFigure 2.

In the drawing the numeral l designates the pile bonnet whose upper endis provided with a deep socket 2 and whose lower end is reduced andformed into prongs 2', 2' having the upwardly converging slot 3 betweenthem to receive the upper end of the web of the piling 4 to be driven.

The bonnet I has the oppositely arranged vertical grooves 5, 5 toreceive the spaced leads or guides 6, 6. Between the upper ends of theseguides is the drive ram 1 which may be mortised into said ends of theguides as shown and the upper ends of the guides and the drive ram aresecurely bolted together. The lower end of the ram is reduced andslightly tapered, forming the drive point 8 which is aligned above therecess 2. In the bottom of this recess there is a resilient shockabsorbing element 9 preferably formed of wood or similar material toreceive the impact of the drive point 8 and to absorb theshock'andthereby protect the upper end of the piling from distortion. The lowerends of the guides 6 have the diverging faces 9, 9, to easily direct theguides over the piling and above said faces 9, the guides are inwardlythickened forming the bearings Ill, H! which closely engage the pilingon opposite sides.

When the bonnet l is located in proper position on the upper end of thepiling to be driven the ram and guides 6, 6 may be alternately elevatedand dropped and the piling thus driven by the successive impacts of thedrive ram against the bonnet. For the purpose of operating the hammer acable II is provided whose lower. end is attached to a link I2 which isfitted into a socket 5 l3 inthe upper end of the ram 1 and a bolt l4isfitted through the ram and through said link. The cable H operatesover a pulley l5, carried by the boom as l6 and any suitable mechanismmay be used for alternately pulling and releasl0 ing the cable II toelevate and. drop the ram. The piling 4 serves as a track for the guides6 and the invention dispenses with the necessity of the erection ofseparate guides or leads for the ram now commonly used in pile hammer 15equipment.

The drawing and description disclose what is now considered a preferredform of the invention by way of illustration only, whilethe broadprinciple of the invention will be defined by the ap- 20 pended claims.

What I claim is:

1. A pile hammer comprising a bonnet shaped to receive the upper end ofpiling, a drive ram, guides embracing and having a slidable connec- 25tion with the bonnet and to which the ram is fixed.

2. A pile hammer comprising a bonnet shaped to receive the upper end ofpiling, a drive ram, guides having a slidable connection with the bonnetand to which the ram is fixed, said guides having bearings arranged toride against opposite sides of the piling being driven.

3. A pile hammer comprising a bonnet adapted to rest on the upper end ofa pile to be driven, a ram arranged to be elevated and dropped,meansguided bythe'pile and arranged to guide the ram, when dropped, ontothe bonnet, said ram and bonnet'being provided one with a recess havinga cushioning element therein and the 40 I other with a drive pointaligned with said element.

4. In combination, an anvil block adapted to be supported on a pile tobe driven, a driving ram above said block and mounted to be elevated anddropped, means carried by the ram and embracing the block and shaped tobe guided by the pile and effective to guide the ram, when dropped, ontothe anvil block.

5. In combination, an anvil block adapted to be supported on a pile tobe driven,a driving ram above said block and mounted to be elevated anddropped, means carried by the ram and shaped to be guided by the pileand effective to guide the ram, when dropped, onto the anvil block,

said block having a recess and a resilient cushion in the recess, and adrive point on the ram arranged to strike the cushion, when the ram isdropped, to cushion the impact.

6. In combination, a block adapted to be supported on a pile to bedriven, a driving ram above the block and mounted to be elevated anddropped, spaced guides carried by the ram and embracing the block' andshaped to be guided by the pile and effective to guide the ram whendropped on to said block, said ram and block being provided, one with arecess having a resilient cushion therein, and the other having a drivepoint aligned with the cushion whereby the impact of the ram, when thelatter is dropped, will be cushioned.

OLE PETERSON.

